Firefox Addon is installed but game wont start

[MrMooMedic]

I have installed the Addon and its in the Addon list to but everytime when i want to play the Game i have to download it again. Firefox is always started as a Administartor

[IEatsBacon]

It's a bug atm. A lot of people have this problem.

Just use IE to start the game till it's fixed.